from the md5deep manual the flag description is:
-m <file>
Enables matching mode. The file given should be a list of known hashes. The input files are examined one at a time, and only those files that match the list of known hashes are output. This flag may be used more than once to add multiple sets of known hashes. Acceptable formats for lists of known hashes are plain (such as those generated by md5deep or md5sum), Hashkeeper files, iLook, and the National Software Reference Library (NSRL) as produced by the National Institute for Standards in Technology.
If standard input is used with the -m flag, displays "stdin" if the input matches one of the hashes in the list of known hashes. If the hash does not match, the program displays no output.

how do i obtain this file containing a list of known hashes to return a match thereby confirming a match to the download file?

yes, I understand that md5, sha1 and sha256 hash values are given on the download site. I cannot find the md5, sha1 or sha256 apps. When the link is selected on the SystemRescueCD website, the app for md5deep and shadeep are provided. If I look at this solution backwards, can you provide the link to md5, sha1 or sha256? I understand that md5deep, shadeep are preferred since they are less prone to yielding a false result.